Poly(vinyl butyral) membrane with superior performance for safety glass was prepared by regulation of processing additives, which has become a hot research field. In the paper, the latest progress of plasticizers, viscosity control agents, and stabilizers used in poly(vinyl butyral) was reviewed. Different kinds of additives were introduced including plasticizers of aliphatic diester, phthalate ester, polyol ester, and phosphate ester, viscosity control agents of alkali and alkali-earth compounds, resinate, and quaternary ammonium salt, as well as thermal and light stabilizers. Selected rules and amount of above additives, and their effects on performance of poly(vinyl butyral) membrane were described in detail. At last, a further view on additives was prospected.